Suppose the world's largest aircraft carrier, the 1,092 feet USS Ronald Reagan, came under enemy attack and was crippled at sea. There's not a ship big enough to rescue it and move it back to the U.S.

In 1943, a B-25 Mitchell - the most versatile twin-engine bomber of World War II - Crash-landed in South Carolina. It sank 150 feet to the bottom of a lake and over time was forgotten. 60 years later, ...